JPS62167921A - Oil impregnated sintered bearing - Google Patents
Oil impregnated sintered bearingInfo
- Publication number
- JPS62167921A JPS62167921A JP734286A JP734286A JPS62167921A JP S62167921 A JPS62167921 A JP S62167921A JP 734286 A JP734286 A JP 734286A JP 734286 A JP734286 A JP 734286A JP S62167921 A JPS62167921 A JP S62167921A
- Authority
- JP
- Japan
- Prior art keywords
- rotary shaft
- bearing
- bearing hole
- rotating shaft
- circular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000010687 lubricating oil Substances 0.000 abstract description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、焼結含油軸受に係り、特に回転軸との摩擦
係数が低い焼結含油軸受に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sintered oil-impregnated bearing, and particularly to a sintered oil-impregnated bearing that has a low coefficient of friction with a rotating shaft.
焼結合金で形成し、潤滑油を含浸させて使用する焼結含
油軸受は、無給油で長期間使用できることから、各種機
器の回転軸の軸受として広く用いられている。この種の
軸受においては、回転軸が挿通される軸受孔は通常断面
円形をなしているが、回転軸との局部接触を防止するた
めにできるだ【プ真円に近い断面形状になるように形成
されている。Sintered oil-impregnated bearings, which are formed from a sintered alloy and impregnated with lubricating oil, are widely used as bearings for rotating shafts of various devices because they can be used for long periods of time without lubrication. In this type of bearing, the bearing hole through which the rotating shaft is inserted usually has a circular cross-section, but in order to prevent local contact with the rotating shaft, it is made to have a cross-sectional shape close to a perfect circle. It is formed.
しかしながら、従来の焼結含油軸受では、軸受孔の内周
面の真円度をできるだけ高くしても、多孔質であるため
どうしても回転軸とのＦＪ擦係数をあるレベル以下には
低下させることができなかったり、また、高粘度油を用
いるような場合には、やはりＳ擦係数が高くなってしま
うという問題があった。However, in conventional sintered oil-impregnated bearings, even if the circularity of the inner circumferential surface of the bearing hole is made as high as possible, the FJ friction coefficient with the rotating shaft cannot be lowered below a certain level because of the porous nature. If this is not possible or if a high viscosity oil is used, there is a problem that the S friction coefficient becomes high.
この発明は、回転軸との１！！擦係数が極めて低い焼結
含油軸受を提供することを目的とし、斯かる目的を達成
するために、この発明による焼結含油軸受は、焼結合金
により形成された軸受本体に、回転軸が挿通される軸受
孔を形成し、上記軸受孔の内周面に、軸受孔の軸心を中
心とする円弧面より大なる曲率を有する円弧面状をなし
、上記回転軸の外周面を支持する少な（とも３面の支持
部を、周方向に形成したことを特徴とする。This invention has 1! with a rotating shaft! ! The purpose of the present invention is to provide a sintered oil-impregnated bearing with an extremely low coefficient of friction, and in order to achieve this purpose, the sintered oil-impregnated bearing according to the present invention has a rotating shaft inserted into a bearing body formed of a sintered alloy. A bearing hole is formed on the inner circumferential surface of the bearing hole, and a circular arc surface having a larger curvature than an arc surface centered on the axis of the bearing hole supports the outer circumferential surface of the rotating shaft. (Both are characterized by having support portions on three sides formed in the circumferential direction.)
この発明の焼結含油軸受においては、軸受孔に挿通され
た回転軸は少なくとも３面の支持部によってその外周面
を支持されて回転するが、支持部と回転軸との摩擦は極
めて少ない。これは、各支持部が軸受孔の軸心を中心と
する円弧面より大なる曲率を有する円弧面状をなしてい
て、回転軸と各支持部の接触面積が少なくなっているこ
とがむしろ好影響を与えているものと思われる。In the sintered oil-impregnated bearing of the present invention, the rotating shaft inserted into the bearing hole rotates with its outer peripheral surface supported by at least three supporting parts, but the friction between the supporting parts and the rotating shaft is extremely small. It is preferable that each support part has a circular arc surface shape having a larger curvature than the circular arc surface centered on the axis of the bearing hole, and that the contact area between the rotating shaft and each support part is reduced. It seems that it is having an influence.
以下、この発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.
第１図ないし第３図は、この発明の第１実施例を示すも
ので、図中１はＦｅ −Ｃｕ系の焼結合金により形成さ
れた円筒状の軸受本体である。この軸受本体１の軸孔は
回転軸２が挿通される軸受孔３となっている。そして、
この軸受孔３の内周面には、軸受孔３の軸心Ｏを中心と
して回転軸２の半径に略等しい半径をなす円弧面よりも
、大なる曲率を有する複数の円弧面が周方向に形成され
、これら複数の円弧面が回転軸２の外周面を支持する支
持部４．・・・となっている。1 to 3 show a first embodiment of the present invention, in which reference numeral 1 denotes a cylindrical bearing body made of Fe--Cu based sintered alloy. The shaft hole of this bearing body 1 serves as a bearing hole 3 into which the rotating shaft 2 is inserted. and,
On the inner circumferential surface of the bearing hole 3, there are a plurality of circular arc surfaces in the circumferential direction that are centered around the axis O of the bearing hole 3 and have a larger curvature than the circular arc surface that has a radius approximately equal to the radius of the rotating shaft 2. A support portion 4. is formed, and the plurality of arcuate surfaces support the outer peripheral surface of the rotating shaft 2. It is...
しかして、上記構成の軸受は、内部に潤滑油が含浸され
て使用され、回転軸２がその軸受孔３に挿通されて回転
する。このとき、回転軸２は、その外周面が上記複数の
支持部４．・・・で支持されることになるが、回転軸２
のＩＩＩｊ擦係数は従来に比し大幅に低下する。これは
、支持部４．・・・が軸受孔３の軸心Ｏを中心として回
転＠２の半径に略等しい半径をなす円弧面よりも、大な
る曲率を有する円弧面状をなしているので、回転軸２と
支持部４゜・・・は路線接触となって接触面積が著しく
低下することなどに起因しているものと思われる。Thus, the bearing having the above structure is used with its inside impregnated with lubricating oil, and the rotating shaft 2 is inserted into the bearing hole 3 and rotated. At this time, the rotating shaft 2 has an outer circumferential surface that is connected to the plurality of supporting parts 4. It will be supported by ..., but the rotating shaft 2
The friction coefficient of IIIj is significantly lower than that of the conventional method. This is the support part 4. ... has a circular arc surface shape with a larger curvature than that of a circular arc surface with a radius approximately equal to the radius of rotation @2 around the axis O of the bearing hole 3, so that the rotating shaft 2 and the support part 4°... is considered to be due to the fact that the contact area is significantly reduced due to contact with the route.
ところで、上記実施例においては、軸受孔３の内周面に
８面の支持部４．・・・を形成したが、支持部４．・・
・は３面以上であれば、その数は任意であり、例えば第
４図の如く９面とし℃もよい。また、第５図に示ずよう
に、任意の支持部４とこの支持部４に隣り合う支持部４
．４との間に凹所５．・・・を形成しても構わない。By the way, in the above embodiment, eight supporting portions 4. are provided on the inner peripheral surface of the bearing hole 3. ... was formed, but the support part 4.・・・
The number of "." is arbitrary as long as it is 3 or more, and for example, it may be 9 as shown in FIG. 4. Further, as shown in FIG. 5, an arbitrary support part 4 and a support part 4 adjacent to this support part 4
．． There is a recess between 4 and 5. It is okay to form...
なお、上記実施例の焼結含油軸受を製造するに当っては
、
■ 成形金型を軸受の最終形状に合せて作る。In manufacturing the sintered oil-impregnated bearing of the above embodiment, (1) A molding die is made to match the final shape of the bearing.
■ 成形金型は、軸受孔３が断面円形になるように作り
、焼結後の矯正金型のコアロッドを最終形状に合せて作
る。■ The molding die is made so that the bearing hole 3 has a circular cross section, and the core rod of the straightening die after sintering is made to match the final shape.
■ 成形金型は、軸受孔３が断面円形となり、かつ、軸
受本体１の外周面に軸方向に延びる複数条の溝を形成す
るように作り、焼結後の矯正金型を円筒形とし、矯正時
に外周面の溝に肉が逃げるようにして内周面に支持部４
．・・・を形成する。■ The forming mold is made so that the bearing hole 3 has a circular cross section and a plurality of grooves extending in the axial direction are formed on the outer peripheral surface of the bearing body 1, and the straightening mold after sintering is made into a cylindrical shape. A support part 4 is installed on the inner circumferential surface so that the meat escapes into the groove on the outer circumferential surface during straightening.
．． ... to form.
などの方法を採ることができる。Methods such as these can be adopted.
（発明の効果〕
以上説明したように、この発明の焼結含油軸受は、軸受
孔の内周面に、軸受孔の軸心を中心どする円弧面より大
なる曲率を有する円弧面状の少なくとも３面の支持部を
形成し、これら支持部により回転軸の外周面を支持する
ようにしたものであるから、回転軸と支持部の接触面積
が著しく低下することなどに起因して回転軸の摩擦係数
が従来に比し大幅に低下すると共に、回転軸との馴染み
性も優れる等の効果を奏する。(Effects of the Invention) As explained above, the sintered oil-impregnated bearing of the present invention has at least one arcuate surface having a larger curvature than an arcuate surface centered on the axis of the bearing hole on the inner circumferential surface of the bearing hole. Since three supporting parts are formed and these supporting parts support the outer circumferential surface of the rotating shaft, the contact area between the rotating shaft and the supporting part is significantly reduced. The coefficient of friction is significantly lower than that of the conventional method, and the compatibility with the rotating shaft is also excellent.
第１図ないし第３図はこの発明の第１実施例を示すもの
で、第１図は平面図、第２図は第１図の■内部の拡大図
、第３図は同房−ｍ矢視断面図、また、第４図および第
５図はそれぞれ他の実施例を示す平面図である。
１・・・軸受本体、２・・・回転軸、３・・・軸受孔、
４・・・支持部。Figures 1 to 3 show a first embodiment of the present invention, in which Figure 1 is a plan view, Figure 2 is an enlarged view of the inside of Figure 1, and Figure 3 is viewed from the cell-m arrow. The sectional view and FIGS. 4 and 5 are plan views showing other embodiments, respectively. 1...Bearing body, 2...Rotating shaft, 3...Bearing hole,
4...Support part.
Claims (1)
れる軸受孔が形成され、上記軸受孔の内周面には、軸受
孔の軸心を中心とする円弧面より大なる曲率を有する円
弧面状をなし、上記回転軸の外周面を支持する少なくと
も３面の支持部が周方向に形成されて成ることを特徴と
する焼結含油軸受。A bearing hole through which a rotating shaft is inserted is formed in a bearing body formed of a sintered alloy, and the inner peripheral surface of the bearing hole has a curvature larger than a circular arc surface centered on the axis of the bearing hole. A sintered oil-impregnated bearing characterized in that a support portion having an arcuate shape and having at least three sides supporting an outer circumferential surface of the rotating shaft is formed in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP734286A JPS62167921A (en) | 1986-01-17 | 1986-01-17 | Oil impregnated sintered bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP734286A JPS62167921A (en) | 1986-01-17 | 1986-01-17 | Oil impregnated sintered bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62167921A true JPS62167921A (en) | 1987-07-24 |
Family
ID=11663266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP734286A Pending JPS62167921A (en) | 1986-01-17 | 1986-01-17 | Oil impregnated sintered bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62167921A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03107612A (en) * | 1989-09-20 | 1991-05-08 | Sankyo Seiki Mfg Co Ltd | Oil-impregnated sintered bearing |
| JPH03505908A (en) * | 1988-07-06 | 1991-12-19 | インターエレクトリック アーゲー | shaft bearing unit |
| US5746516A (en) * | 1995-08-11 | 1998-05-05 | Hitachi Powdered Metals Co., Ltd. | Porous bearing system having internal grooves and electric motor provided with the same |
| US6120188A (en) * | 1997-06-19 | 2000-09-19 | Matsushita Electric Industiral Co., Ltd. | Bearing unit manufacturing method bearing unit and motor using the bearing unit |
| JP2002525503A (en) * | 1998-09-11 | 2002-08-13 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Sintered bearings for engines and transmissions |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS436806Y1 (en) * | 1964-10-14 | 1968-03-27 |
-
1986
- 1986-01-17 JP JP734286A patent/JPS62167921A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS436806Y1 (en) * | 1964-10-14 | 1968-03-27 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03505908A (en) * | 1988-07-06 | 1991-12-19 | インターエレクトリック アーゲー | shaft bearing unit |
| JPH03107612A (en) * | 1989-09-20 | 1991-05-08 | Sankyo Seiki Mfg Co Ltd | Oil-impregnated sintered bearing |
| US5746516A (en) * | 1995-08-11 | 1998-05-05 | Hitachi Powdered Metals Co., Ltd. | Porous bearing system having internal grooves and electric motor provided with the same |
| US5932946A (en) * | 1995-08-11 | 1999-08-03 | Hitachi Powdered Metals Co., Ltd | Porous bearing system having internal grooves and electric motor provided with the same |
| US6120188A (en) * | 1997-06-19 | 2000-09-19 | Matsushita Electric Industiral Co., Ltd. | Bearing unit manufacturing method bearing unit and motor using the bearing unit |
| JP2002525503A (en) * | 1998-09-11 | 2002-08-13 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Sintered bearings for engines and transmissions |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100364860B1 (en) | Dynamic pressure bearing device and method for manufacturing it | |
| CA1283436C (en) | Power shaped multipad hydrodynamic journal bearing | |
| US3751121A (en) | Segmental cage for linear and linear/rotary bearings | |
| JPS62167921A (en) | Oil impregnated sintered bearing | |
| JPS61266827A (en) | Cage and roller | |
| JPS62167922A (en) | Metal powder sintered bearing, oil impregnated | |
| JP2501729B2 (en) | Sliding rolling bearing with rolling elements | |
| JPH11247846A (en) | Roller bearing | |
| JPH0571539A (en) | Oil impregnated sintered bearing | |
| US20020096952A1 (en) | Cast motor end shield including insert and method for casting | |
| JP3649486B2 (en) | Sintered bearing and manufacturing method thereof | |
| JP2002339979A (en) | Single row ball turning bearing | |
| US3146039A (en) | Ball bearing | |
| JPH0819941B2 (en) | Sintered oil-impregnated bearing | |
| EP0158206A2 (en) | A ball bearing | |
| JP2004522089A (en) | Contoured roller bearings | |
| JP3545140B2 (en) | Bearing and manufacturing method thereof | |
| JPH07243439A (en) | Rolling bearing designed to soften stress concentration and its manufacture | |
| JPS6131539Y2 (en) | ||
| JPH0342259Y2 (en) | ||
| JP3782900B2 (en) | Hydrodynamic bearing and hydrodynamic bearing unit | |
| JPS5940623U (en) | Plastic cage for spherical roller bearings | |
| JPS58123919U (en) | floating bush bearing | |
| JPS60177154U (en) | Variable spacing cross guide roller | |
| JPS6077816U (en) | roller bearing |